and contrive
mechanical wonders that interest and convince the reader because they
always "work" when put to the test.

THE BOY INVENTORS' VANISHING GUN.

A thought, a belief, an experiment; discouragement, hope, effort and
final success--this is the history of many an invention; a history in
which excitement, competition, danger, despair and persistence figure.
This merely suggests the circumstances which draw the daring Boy
Inventors into strange experiences and startling adventures, and which
demonstrate the practical use of their vanishing gun.

THE BOY INVENTORS' DIVING TORPEDO BOAT.

As in the previous stories of the Boy Inventors, new and interesting
triumphs of mechanism are produced which become immediately valuable,
and the stage for their proving and testing is again the water. On the
surface and below it, the boys have jolly, contagious fun, and the story
of their serious, purposeful inventions challenge the reader's deepest
attention.

Any volume sent postpaid upon receipt of price.

HURST & COMPANY--Publishers--NEW YORK

BORDER BOYS SERIES

Mexican and Canadian Frontier Series

By FREMONT B. DEERING.

Cloth Bound. Illustrated. Price, 50c. per vol., postpaid

THE BORDER BOYS ON THE TRAIL.

What it meant to make an enemy of Black Ramon De Barios--that is the
problem that Jack Merrill and his friends, including Coyote Pete, face
in this exciting tale.

THE BORDER BOYS ACROSS THE FRONTIER.

Read of the Haunted Mesa and its mysteries, of the Subterranean River
and its strange uses, of the value of gasolene and steam "in running the
gauntlet," and you will feel that not even the ancient splendors of the
Old World can furnish a better setting for romantic action than the
Border of the New.

THE BORDER BOYS WITH THE MEXICAN RANGERS.

As every day is making history--faster, it is said, than ever before--so
books that keep pace with the changes are full of rapid action and
accurate facts. This book deals with lively times on the Mexican border.

THE BORDER BOYS WITH THE TEXAS RANGERS.

The Border Boys have already had much excitement and adventure in their
lives, but all this has served to prepare them for the experiences
related in this volume. They are stronger, braver and more resourceful
than ever, and the exigencies of their life in connection with the Texas
Rangers demand all their trained ability.

Any volume sent postpaid upon receipt of price.

HURST & COMPANY--Publishers--N